Device for laying plastic pavements



3 I J. P. ROGERS 0,4

DEVICE FOR LAYING PLASTIC PAVEMENTS .Filed Oct. 22. 1929 INVENTOR JBknBRogers BY W9% ATTORN EYS Patented Dec. 6, 1932 UNITED STATES r-ATENTJOHN P. ROGERS, OF SAN :DIEGO, CALIFORNIA;

DEVICE FOR. LAYING smm msf Application filed ctober22, 1929. Serial No.401,454.

This invention relates to paving, and comprehends a device for formingan elastic joint in plastic pavements in order to compensate for thecontraction and expansion thereof.

The invention comprehends a device for making provision when laying aplastic pavement, for a joint to allow for the contraction and expansionof the pavement in order to I avoid cracking, which device consists ofa 1) form member adapted to be installed over the surface to be pavedin'such a manner as to divide the plastic pavement forming ma terialinto independent areas, which form member is constructed in such amanner as to facilitate its emplacement with respect to the pavementreinforcing means and to further facilitate its removal from between theadj acent formed pavement sections.

Other objects of the invention reside in 29 the simplicity ofconstruction of the device employed, the economy with which the same maybe produced and the general efiiciency derived therefrom.

With the above recited and other objects in view, reference is had tothe following description and accompanying drawing, in which there areexhibited several examples or embodiments of the invention, while theclaim defines the actual scope thereof. 1

In the drawing:

Figure 1 is a sectional perspective view il lustrating the manner inwhich the device is employed during the laying of the pavement. Figure 2is a side view of the device or form member.

Figure 3 is an enlarged transverse "sectional view therethrough, takenapproximately on the line 3'3 ofFigure 2.

Figure 4 is a, similar view of a slightly modified form of the member.Figure 5 is a side elevation of a still further modification of theinvention.

Figure 6 is a sectional view illustrating the than ati its lower end top ovideupwardly' V I diverging or w I downwardly converging side's11,11. In practice, the strip 10 is preferably constructed with a woodencore 12:"which is covered by a sheetv metalcovering'131extendwith 1inturned flan'ges 14 partially overlying its upper edge. A heavier andmore rigid length of sheet'm'etal 15' overlies. the

edge of the core'12 and the flanges: 14 and is preferably secured inplace by screws or other fastening devices 16 which" extend therethroughand area-nchored into thecore. The opposite ends of the uppercoveringsheet 15 extend beyond the ends of the core and the covering 13and are bent'inwardly and downwardly as at 17 to provide handle portionsby virtue of which the strips may be handled. l

The tapering form of the strip illustrated in Figure 3 may be varied asillustrated in J Figure 4, in which instance one of the side surfaces 18is disposed at a'right angle to the upper surface 19 andthe oppositesidesurface 20 is inclined toward thelower edge 21 I l or cementitiouspavement forming material 22 into independent areas or blocks,;asillustrated in Figure 1. In order, however, to: avoid interference with'theproper positioning of the strips desc-ribed,ithe usual reinforcingmaterial .23 is deflected. or offset downwardlyas at24= and the exposedbight portion will be protected at this point from moisture by tar paper,25.

' In practice, the strips 10 will be positioned over the'surface to bepaved in such a manner as to subdivide the plastic pavement formingmaterial 22 into independent areas.

The strips will remain in place for asuflicient length of time to allowthe material to set or harden to such adegree as to permit of theremoval of the f rm, members or the strips 10 without defacing, damagingor otherwise marring the pavement surface. "The strips or form memberswill then be removed and a suitable elastic or resilient filler'will beinfing around its side surfaces and loweredge 1 i I g Y 1 90 412troduced into the spaces 26 formed between the adjacent pavement areas.

Asan alternative to offsetting the reinforc- 7 ving means 23, the stripsor form members 10 asillustrated' in Figures 5 and 6 of the drawing, maybe provided with notches 27 extending upwardly from the lower edges toaccommodate the reinforcing means 23 and f to avoid the necessity ofcaklng or ofi'setting the same. In use, the sides of the strips or d epform members, 10 willbe. oiled .or otherwise .a

V lubricated to facilitate their removal from form member v for ilse inlaying plastic between the adjacent *paving sections" or areas. I I

What is claimedis pavements comprising an elongated substantially wedgeshaped strip; consisting of aor I wooden, core, a sheetmetal coveringextending around thesides .and lower narrow edge afid'aIigid'metaI stripf eaterthi,ckness i than'thecoveringzarranged over the upper e wideredge thereof, said latter strip extend ingv beyond the ends of the coreand bent downwardly and inwardly to provide handles for facilitating thehandling of the form m m e -v "JOHN P Q ROGERS. I '7

